git-am.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2005, 2006 Junio C Hamano
   4
   5 USAGE='[--signoff] [--dotest=<dir>] [--keep] [--utf8 | --no-utf8]
   6   [--3way] [--interactive] [--binary]
   7   [--whitespace=<option>] [-C<n>] [-p<n>]
   8   <mbox>|<Maildir>...
   9   or, when resuming [--skip | --resolved]'
  10 . git-sh-setup
  11 set_reflog_action am
  12 require_work_tree
  13
  14 git var GIT_COMMITTER_IDENT >/dev/null || exit
  15
  16 stop_here () {
  17     echo "$1" >"$dotest/next"
  18     exit 1
  19 }
  20
  21 stop_here_user_resolve () {
  22     if [ -n "$resolvemsg" ]; then
  23             printf '%s\n' "$resolvemsg"
  24             stop_here $1
  25     fi
  26     cmdline=$(basename $0)
  27     if test '' != "$interactive"
  28     then
  29         cmdline="$cmdline -i"
  30     fi
  31     if test '' != "$threeway"
  32     then
  33         cmdline="$cmdline -3"
  34     fi
  35     if test '.dotest' != "$dotest"
  36     then
  37         cmdline="$cmdline -d=$dotest"
  38     fi
  39     echo "When you have resolved this problem run \"$cmdline --resolved\"."
  40     echo "If you would prefer to skip this patch, instead run \"$cmdline --skip\"."
  41
  42     stop_here $1
  43 }
  44
  45 go_next () {
  46         rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
  47                 "$dotest/patch" "$dotest/info"
  48         echo "$next" >"$dotest/next"
  49         this=$next
  50 }
  51
  52 cannot_fallback () {
  53         echo "$1"
  54         echo "Cannot fall back to three-way merge."
  55         exit 1
  56 }
  57
  58 fall_back_3way () {
  59     O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
  60
  61     rm -fr "$dotest"/patch-merge-*
  62     mkdir "$dotest/patch-merge-tmp-dir"
  63
  64     # First see if the patch records the index info that we can use.
  65     git apply -z --index-info "$dotest/patch" \
  66         >"$dotest/patch-merge-index-info" &&
  67     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  68     git update-index -z --index-info <"$dotest/patch-merge-index-info" &&
  69     GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  70     git write-tree >"$dotest/patch-merge-base+" ||
  71     cannot_fallback "Repository lacks necessary blobs to fall back on 3-way merge."
  72
  73     echo Using index info to reconstruct a base tree...
  74     if GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
  75         git apply $binary --cached <"$dotest/patch"
  76     then
  77         mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
  78         mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
  79     else
  80         cannot_fallback "Did you hand edit your patch?
  81 It does not apply to blobs recorded in its index."
  82     fi
  83
  84     test -f "$dotest/patch-merge-index" &&
  85     his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git write-tree) &&
  86     orig_tree=$(cat "$dotest/patch-merge-base") &&
  87     rm -fr "$dotest"/patch-merge-* || exit 1
  88
  89     echo Falling back to patching base and 3-way merge...
  90
  91     # This is not so wrong.  Depending on which base we picked,
  92     # orig_tree may be wildly different from ours, but his_tree
  93     # has the same set of wildly different changes in parts the
  94     # patch did not touch, so recursive ends up canceling them,
  95     # saying that we reverted all those changes.
  96
  97     eval GITHEAD_$his_tree='"$SUBJECT"'
  98     export GITHEAD_$his_tree
  99     git-merge-recursive $orig_tree -- HEAD $his_tree || {
 100             git rerere
 101             echo Failed to merge in the changes.
 102             exit 1
 103     }
 104     unset GITHEAD_$his_tree
 105 }
 106
 107 prec=4
 108 dotest=.dotest sign= utf8=t keep= skip= interactive= resolved= binary=
 109 resolvemsg= resume=
 110 git_apply_opt=
 111
 112 while case "$#" in 0) break;; esac
 113 do
 114         case "$1" in
 115         -d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
 116         dotest=`expr "z$1" : 'z-[^=]*=\(.*\)'`; shift ;;
 117         -d|--d|--do|--dot|--dote|--dotes|--dotest)
 118         case "$#" in 1) usage ;; esac; shift
 119         dotest="$1"; shift;;
 120
 121         -i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
 122         --interacti|--interactiv|--interactive)
 123         interactive=t; shift ;;
 124
 125         -b|--b|--bi|--bin|--bina|--binar|--binary)
 126         binary=t; shift ;;
 127
 128         -3|--3|--3w|--3wa|--3way)
 129         threeway=t; shift ;;
 130         -s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
 131         sign=t; shift ;;
 132         -u|--u|--ut|--utf|--utf8)
 133         utf8=t; shift ;; # this is now default
 134         --no-u|--no-ut|--no-utf|--no-utf8)
 135         utf8=; shift ;;
 136         -k|--k|--ke|--kee|--keep)
 137         keep=t; shift ;;
 138
 139         -r|--r|--re|--res|--reso|--resol|--resolv|--resolve|--resolved)
 140         resolved=t; shift ;;
 141
 142         --sk|--ski|--skip)
 143         skip=t; shift ;;
 144
 145         --whitespace=*|-C*|-p*)
 146         git_apply_opt="$git_apply_opt $1"; shift ;;
 147
 148         --resolvemsg=*)
 149         resolvemsg=${1#--resolvemsg=}; shift ;;
 150
 151         --)
 152         shift; break ;;
 153         -*)
 154         usage ;;
 155         *)
 156         break ;;
 157         esac
 158 done
 159
 160 # If the dotest directory exists, but we have finished applying all the
 161 # patches in them, clear it out.
 162 if test -d "$dotest" &&
 163    last=$(cat "$dotest/last") &&
 164    next=$(cat "$dotest/next") &&
 165    test $# != 0 &&
 166    test "$next" -gt "$last"
 167 then
 168    rm -fr "$dotest"
 169 fi
 170
 171 if test -d "$dotest"
 172 then
 173         case "$#,$skip$resolved" in
 174         0,*t*)
 175                 # Explicit resume command and we do not have file, so
 176                 # we are happy.
 177                 : ;;
 178         0,)
 179                 # No file input but without resume parameters; catch
 180                 # user error to feed us a patch from standard input
 181                 # when there is already .dotest.  This is somewhat
 182                 # unreliable -- stdin could be /dev/null for example
 183                 # and the caller did not intend to feed us a patch but
 184                 # wanted to continue unattended.
 185                 tty -s
 186                 ;;
 187         *)
 188                 false
 189                 ;;
 190         esac ||
 191         die "previous dotest directory $dotest still exists but mbox given."
 192         resume=yes
 193 else
 194         # Make sure we are not given --skip nor --resolved
 195         test ",$skip,$resolved," = ,,, ||
 196                 die "Resolve operation not in progress, we are not resuming."
 197
 198         # Start afresh.
 199         mkdir -p "$dotest" || exit
 200
 201         git mailsplit -d"$prec" -o"$dotest" -b -- "$@" > "$dotest/last" ||  {
 202                 rm -fr "$dotest"
 203                 exit 1
 204         }
 205
 206         # -b, -s, -u, -k and --whitespace flags are kept for the
 207         # resuming session after a patch failure.
 208         # -3 and -i can and must be given when resuming.
 209         echo "$binary" >"$dotest/binary"
 210         echo " $ws" >"$dotest/whitespace"
 211         echo "$sign" >"$dotest/sign"
 212         echo "$utf8" >"$dotest/utf8"
 213         echo "$keep" >"$dotest/keep"
 214         echo 1 >"$dotest/next"
 215 fi
 216
 217 case "$resolved" in
 218 '')
 219         files=$(git diff-index --cached --name-only HEAD) || exit
 220         if [ "$files" ]; then
 221            echo "Dirty index: cannot apply patches (dirty: $files)" >&2
 222            exit 1
 223         fi
 224 esac
 225
 226 if test "$(cat "$dotest/binary")" = t
 227 then
 228         binary=--allow-binary-replacement
 229 fi
 230 if test "$(cat "$dotest/utf8")" = t
 231 then
 232         utf8=-u
 233 else
 234         utf8=-n
 235 fi
 236 if test "$(cat "$dotest/keep")" = t
 237 then
 238         keep=-k
 239 fi
 240 ws=`cat "$dotest/whitespace"`
 241 if test "$(cat "$dotest/sign")" = t
 242 then
 243         SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
 244                         s/>.*/>/
 245                         s/^/Signed-off-by: /'
 246                 `
 247 else
 248         SIGNOFF=
 249 fi
 250
 251 last=`cat "$dotest/last"`
 252 this=`cat "$dotest/next"`
 253 if test "$skip" = t
 254 then
 255         git rerere clear
 256         this=`expr "$this" + 1`
 257         resume=
 258 fi
 259
 260 if test "$this" -gt "$last"
 261 then
 262         echo Nothing to do.
 263         rm -fr "$dotest"
 264         exit
 265 fi
 266
 267 while test "$this" -le "$last"
 268 do
 269         msgnum=`printf "%0${prec}d" $this`
 270         next=`expr "$this" + 1`
 271         test -f "$dotest/$msgnum" || {
 272                 resume=
 273                 go_next
 274                 continue
 275         }
 276
 277         # If we are not resuming, parse and extract the patch information
 278         # into separate files:
 279         #  - info records the authorship and title
 280         #  - msg is the rest of commit log message
 281         #  - patch is the patch body.
 282         #
 283         # When we are resuming, these files are either already prepared
 284         # by the user, or the user can tell us to do so by --resolved flag.
 285         case "$resume" in
 286         '')
 287                 git mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
 288                         <"$dotest/$msgnum" >"$dotest/info" ||
 289                         stop_here $this
 290
 291                 # skip pine's internal folder data
 292                 grep '^Author: Mail System Internal Data$' \
 293                         <"$dotest"/info >/dev/null &&
 294                         go_next && continue
 295
 296                 test -s $dotest/patch || {
 297                         echo "Patch is empty.  Was it split wrong?"
 298                         stop_here $this
 299                 }
 300                 git stripspace < "$dotest/msg" > "$dotest/msg-clean"
 301                 ;;
 302         esac
 303
 304         GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
 305         GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
 306         GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
 307
 308         if test -z "$GIT_AUTHOR_EMAIL"
 309         then
 310                 echo "Patch does not have a valid e-mail address."
 311                 stop_here $this
 312         fi
 313
 314         export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 315
 316         SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
 317         case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
 318
 319         case "$resume" in
 320         '')
 321             if test '' != "$SIGNOFF"
 322             then
 323                 LAST_SIGNED_OFF_BY=`
 324                     sed -ne '/^Signed-off-by: /p' \
 325                     "$dotest/msg-clean" |
 326                     tail -n 1
 327                 `
 328                 ADD_SIGNOFF=`
 329                     test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
 330                     test '' = "$LAST_SIGNED_OFF_BY" && echo
 331                     echo "$SIGNOFF"
 332                 }`
 333             else
 334                 ADD_SIGNOFF=
 335             fi
 336             {
 337                 printf '%s\n' "$SUBJECT"
 338                 if test -s "$dotest/msg-clean"
 339                 then
 340                         echo
 341                         cat "$dotest/msg-clean"
 342                 fi
 343                 if test '' != "$ADD_SIGNOFF"
 344                 then
 345                         echo "$ADD_SIGNOFF"
 346                 fi
 347             } >"$dotest/final-commit"
 348             ;;
 349         *)
 350                 case "$resolved$interactive" in
 351                 tt)
 352                         # This is used only for interactive view option.
 353                         git diff-index -p --cached HEAD >"$dotest/patch"
 354                         ;;
 355                 esac
 356         esac
 357
 358         resume=
 359         if test "$interactive" = t
 360         then
 361             test -t 0 ||
 362             die "cannot be interactive without stdin connected to a terminal."
 363             action=again
 364             while test "$action" = again
 365             do
 366                 echo "Commit Body is:"
 367                 echo "--------------------------"
 368                 cat "$dotest/final-commit"
 369                 echo "--------------------------"
 370                 printf "Apply? [y]es/[n]o/[e]dit/[v]iew patch/[a]ccept all "
 371                 read reply
 372                 case "$reply" in
 373                 [yY]*) action=yes ;;
 374                 [aA]*) action=yes interactive= ;;
 375                 [nN]*) action=skip ;;
 376                 [eE]*) git_editor "$dotest/final-commit"
 377                        action=again ;;
 378                 [vV]*) action=again
 379                        LESS=-S ${PAGER:-less} "$dotest/patch" ;;
 380                 *)     action=again ;;
 381                 esac
 382             done
 383         else
 384             action=yes
 385         fi
 386
 387         if test $action = skip
 388         then
 389                 go_next
 390                 continue
 391         fi
 392
 393         if test -x "$GIT_DIR"/hooks/applypatch-msg
 394         then
 395                 "$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
 396                 stop_here $this
 397         fi
 398
 399         echo
 400         printf 'Applying %s\n' "$SUBJECT"
 401         echo
 402
 403         case "$resolved" in
 404         '')
 405                 git apply $git_apply_opt $binary --index "$dotest/patch"
 406                 apply_status=$?
 407                 ;;
 408         t)
 409                 # Resolved means the user did all the hard work, and
 410                 # we do not have to do any patch application.  Just
 411                 # trust what the user has in the index file and the
 412                 # working tree.
 413                 resolved=
 414                 git diff-index --quiet --cached HEAD && {
 415                         echo "No changes - did you forget to use 'git add'?"
 416                         stop_here_user_resolve $this
 417                 }
 418                 unmerged=$(git ls-files -u)
 419                 if test -n "$unmerged"
 420                 then
 421                         echo "You still have unmerged paths in your index"
 422                         echo "did you forget to use 'git add'?"
 423                         stop_here_user_resolve $this
 424                 fi
 425                 apply_status=0
 426                 git rerere
 427                 ;;
 428         esac
 429
 430         if test $apply_status = 1 && test "$threeway" = t
 431         then
 432                 if (fall_back_3way)
 433                 then
 434                     # Applying the patch to an earlier tree and merging the
 435                     # result may have produced the same tree as ours.
 436                     git diff-index --quiet --cached HEAD && {
 437                         echo No changes -- Patch already applied.
 438                         go_next
 439                         continue
 440                     }
 441                     # clear apply_status -- we have successfully merged.
 442                     apply_status=0
 443                 fi
 444         fi
 445         if test $apply_status != 0
 446         then
 447                 echo Patch failed at $msgnum.
 448                 stop_here_user_resolve $this
 449         fi
 450
 451         if test -x "$GIT_DIR"/hooks/pre-applypatch
 452         then
 453                 "$GIT_DIR"/hooks/pre-applypatch || stop_here $this
 454         fi
 455
 456         tree=$(git write-tree) &&
 457         echo Wrote tree $tree &&
 458         parent=$(git rev-parse --verify HEAD) &&
 459         commit=$(git commit-tree $tree -p $parent <"$dotest/final-commit") &&
 460         echo Committed: $commit &&
 461         git update-ref -m "$GIT_REFLOG_ACTION: $SUBJECT" HEAD $commit $parent ||
 462         stop_here $this
 463
 464         if test -x "$GIT_DIR"/hooks/post-applypatch
 465         then
 466                 "$GIT_DIR"/hooks/post-applypatch
 467         fi
 468
 469         go_next
 470 done
 471
 472 rm -fr "$dotest"